TrojanDownloader_O97M_Donoff_CB

YARA detection rule by roadwy

TrojanDownloader:O97M/Donoff.CB,SIGNATURE_TYPE_MACROHSTR_EXT,10 00 10 00 05 00 00

rule TrojanDownloader_O97M_Donoff_CB{
	meta:
		description = "TrojanDownloader:O97M/Donoff.CB,SIGNATURE_TYPE_MACROHSTR_EXT,10 00 10 00 05 00 00 "
		
	strings :
		$a_01_0 = {2e 45 78 70 61 6e 64 45 6e 76 69 72 6f 6e 6d 65 6e 74 53 74 72 69 6e 67 73 28 43 68 72 28 33 37 29 20 2b 20 43 68 72 28 38 34 29 20 2b 20 43 68 72 28 37 37 29 20 2b 20 43 68 72 28 38 30 29 20 } 		$a_01_1 = {3d 20 43 72 65 61 74 65 4f 62 6a 65 63 74 28 43 68 72 28 37 37 29 20 2b 20 43 68 72 28 31 30 35 29 20 2b 20 43 68 72 28 39 39 29 20 2b 20 43 68 72 28 31 31 34 29 20 2b 20 43 68 72 28 31 31 31 } 		$a_01_2 = {2e 57 72 69 74 65 20 4f 52 50 56 45 4c 50 50 55 47 45 53 54 4a 4e 57 42 56 4c 49 4a 49 4b 44 47 4b 53 47 2e 72 65 73 70 6f 6e 73 65 42 6f 64 79 } 		$a_01_3 = {2e 4f 70 65 6e 20 22 47 45 54 22 2c 20 46 4e 49 4b 47 53 48 56 55 4d 47 51 4c 48 4f 54 4b 4b 45 45 52 56 43 51 5a 50 43 4b 2c 20 46 61 6c 73 65 } 		$a_01_4 = {3d 20 43 68 72 28 41 73 63 28 4e 56 58 59 55 48 56 4c 44 42 56 47 42 56 44 49 5a 5a 54 4d 5a 4c 52 59 50 58 51 53 29 20 2d 20 } 	condition:
		((#a_01_0  & 1)*3+(#a_01_1  & 1)*3+(#a_01_2  & 1)*3+(#a_01_3  & 1)*4+(#a_01_4  & 1)*3) >=16
 
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

dcb9b03a-dc77-40bf-91d8-4c3773b0b50a

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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